Allegra travels at an average speed of 60 mph for 40 miles. Without stopping, Allegra then travels 50 miles in 1.25 hours. Find her average speed for the entire journey to 2 dp.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b